A lot of people don't understand the condition Gynecomastia so here is a little more information about the topic:
One of the most common misconception is that Gynecomastia can easily be "solved" by weight loss, which is not factual.
Gynecomastia is a result of the development of abnormally large mammary glands in men resulting in what appears to be male breasts. Specifically it is characterized by excess glandular tissue development and localized fat or a combination of both.
According to The American Society for Aesthetic Plastic Surgery it can be caused by hormonal changes, heredity conditions or drug use.
The ASAPS also says Gynecomastia has been known to result in low self esteem and unhappiness with one’s physical appearance.
Additionally, Gynecomastia may occur unilaterally (one breast) or bilaterally (both breasts).